Influence of time dependence of dynamic laser parameter on the three modes random laser operation

In this report we demonstrate the influence of the photon density on the operation of a three modes random laser when the gain coefficients of modes depending on time. Supposing gain coefficients had Gaussian profile and using Matlab language, we have solved the basic equations describing the operation of a three modes random laser. The received results give more real knowledge about the appearance of modes in random laser. (author)